20688096762667 has 2 divisors, whose sum is σ = 20688096762668. Its totient is φ = 20688096762666.

The previous prime is 20688096762601. The next prime is 20688096762701. The reversal of 20688096762667 is 76626769088602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20688096762667 - 2⁷ = 20688096762539 is a prime.

It is a super-2 number, since 2×20688096762667² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20688096762667.

It is not a weakly prime, because it can be changed into another prime (20688096762467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10344048381333 + 10344048381334.

It is an arithmetic number, because the mean of its divisors is an integer number (10344048381334).

Almost surely, 2^{20688096762667} is an apocalyptic number.

20688096762667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20688096762667 is an equidigital number, since it uses as much as digits as its factorization.

20688096762667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 877879296, while the sum is 73.

The spelling of 20688096762667 in words is "twenty trillion, six hundred eighty-eight billion, ninety-six million, seven hundred sixty-two thousand, six hundred sixty-seven".